The previous iPod has the Breakout game as an easter egg, however, I think that the current iPod has the Breakout game as a normal feature that you can select through the normal menu selection under the extras category.
So far I know, there aren't any other games for the iPod. But I'm sure that a good hacker probably will implement one, or even Apple itself might want to add more games
As for iPod for gaming.
LOL! Here's an interesting idea, what if BanDai and Apple join forces again?
And your iPod could be the incubation pod for a digital lifeform. LOL!
Anyway. As for a built-in mic on the iPod.
That would be a neat feature to add in future version of the iPod, people could record message memos while they're travelling, and with around of the minimum of 5 GB of storage spaces, that's a LOT of voice memos!
Please send your comments to Apple. Feedback is necessary if you want the iPod to improve.
Though for recording something other than voice memos. The iPod needs more than a built-in mic, it need to have input capability on both its audio jack (the same jack can be used for both audio input and audio output) and Firewire port (using Firewire audio iput device).
Note: A Firewire audio input device would be nice too though, but it would be quite expensive, I doubt that many would buy one even if they said that they wanted it.